I have a Keeton Kutter with a Hendrixson head. The Keeton came with absolutely ZERO instructions and the Hendrixson head came with a 1/4 inch thick booklet of totally incomprehensible instructions written by RAH himself.
Actually Hendrixson had me on the phone for over two hours whilst I installed the head and I just kept saying "Uh-huh" to his questions and suggestions. He was an aerospace engineer before he became a framer. Talk about tech-talk!
But the Keeton works just great with only occasional cleaning and tefloning. Save small knock-outs to clean bar and use Q-tips and toilet paper - that's how Hendrixson taught me.
As a matter of fact - my head stopped sliding just yesterday (doesn't that sound weird?) and I disassembled the whole thing and found clumps of black oily (teflony?) crap everywhere it could possibly hide! When I cleaned it all nice and spiffy, I discovered some writing on the inside of the head. Bob had written, "Hi Mar" and I had totally forgotten!
Guess I should clean it more often!